Gib and key.



U. A. FISCHER.

GIB AND KEY.

APPLICATION FILED AUG.15, 1910.

l,16,9%. Patented Au 11, 19m

WITNEESEE f INVENTUR- (Zing/a, E AT m F N EY- UNITED STATES an ice.

CHARLES A. FISCHER, OF MILWAUKEE, \JVISCONSIN. ASSIG'NOR BY MESNE ASSIGN- MENTS. TO ALLIS-CHALMERS MANUFACTURING COMPANY, A CORPORATION OF DELAWARE. Y

GIB AND KEY.

Milwaukee, in the county of Milwaukee and 'btate of YISCODSID. have invented a certain new and useful ln'iprovement in Gibs and Keys, of which the following is a specification.

This invention relates to improvements in the construction of the gib and key fastening for crushing rolls and more particularly to means for fastening the shell segments to rolls of relatively large diameter.

The invention is of general application as a. gih and key but is disclosed herein as applied to crushing rolls.

The object of the invention is to provide a means for fastening a sectional roll shell to the roller head of a crushing roll. which is simple in construction. ellicient in operation. and by means of which the section of the shell can be easily removed from or fastened to the roll head.

A clear conception of one embodiment of the invention can be obtained by referring to the accompanying drawing in which like reference characters designate the same or similar parts in like or different views.

Figure l is an end elevation of a crushing roll having a sectional shell. the clamping nuts and washers being omitted from the lower shell fastening wedges of the disclosure. Fig. 2 is a horizontal transverse section of the device shown in Fig. 1.

The roller head 1 consists essentiallyof a cylindrical hub which is surrounded by acylindrical shell-sumiorting rim. the rim and huh being connected by two parallel ribs having an annular space 12 formed between them. The connecting ribs are pcnctratcd by eorcd holes 3. by means of which the core for forming the space '12 is supported during asting of the roll head 1. Radial ribs 2 project outwardly from the parallel ribs connecting the rim and the hub of the roll head 1.

Parallel annular grooves 4 extend inwardly from the periphery of the rim of the head 1 and constitute recesses and if so desired may be more thantwo in number. The shell sections 7 having the inwardly extending projections 10 formed thereon, co act against a coating of lead or babbitt 11,

which in turn coacts against the outer pe- Specification of Letters Patent.

Application filed August 15, 1910.

Patent ed fin it il'tlilet. Serial No. 577.202.

riphery of the roll head 1. The projections 10 formed on the shell section 7 coact within the recesses or annular grooves 4. extending nearly to the bottom of said grooves. W'edges or keys 8 coact with their surfaces which are nearest the roll center. against corresponding surfaces of rectangulauholes formed through the projections 1O of the sections 7. The opposite and tapered surfaces of the wedges 8 eoact against surfaces of wedge blocks 9 nearest the roll center. the outer surfaces of the wedge blocks 9 coacting against correrpomling surfaces of rectangular openings formed on the roll head 1. The wedge blocks or gibs 9 have short projections 15 which are of a. width equal to that of the grooves it. and which normally extend slightly outward into the groove 4-. thus locking the blocks in place and preventing the same from slipping endwise.

The washers 6, nuts 14 and lock nuts 5 are placed on the projecting rounded and threaded ends of the wedges 8 or on bolts extending through the wedges.

In fastening the shell sections 7 to the roll head 1. the. sections are so located. that the openings formed through the projec tions 10 thereof partly register with the cor-- responding openings formed through the parallel ribs of the roll head 1. The wedges 8 are then inserted into the partly registered openings from the ends of the roll to a position nearer the mid plane of the roll than they will finally have. The wedge blocks 9 are slipped into place. the projections 15 being sullicientlv short to permit such insertion. after which the wedges 8 are brought forward sulliciently to tighten all the parts. The washers t' and lock nuts 5 a re then applied.

It will be noted that with the construction of wedge 8 and wedge block 5). as shown the surfaces of coaction between the wedge 8 and shell 7. and between the wedge block 9 and the roll h ad 1. are parallel surfaces which are comparatively easy to machine. The wedge surfaces of coaction are formed on the relatively small and easily machined the insertion and removal of the wedges 8 from the ends of the roll instead of from the center of the roll as heretofore.

It should be understood that it is not desired to be limited to the exact details of construction shown and describedyfor ob- \lOHS modifications will occur to a person skilled in the art.

It is claimed and desired to secure by Letters Patent;-

The combination of two parts, one of the parts having a recess and the second part projecting into said recess, partly registrable openings formed in the parts across the recess, a gib block inserted in said openings, said gib block spanning said recess and having a projection extending into the said recess and fitting against the walls thereof, a wedge inserted in said openings, and means for advancing said wedge into contact with said second part and with said gib block to force said gib block against said recessed part.

In testimony whereof, I aflix my signature in the presence of two witnesses.

CHARLES A. FISCHER. Witnesses:

CHAS. L. BYRON, \V. H. LLEBER. 

